<template>
	<view>
    <!-- <my-search :bgcolor="'pink'" :radius="3"/> -->
    <my-search :bgcolor="'pink'" @click="gotoSearch()"/>
		<view class="scoll-view-container">
		  <!-- 左侧的滑动区域 -->
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh+'px'}" >
        <block v-for="item,i in cateList" :key="i">
            <view :class="['left-scroll-view-item', i === active ? 'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
      <!-- 右侧的滑动区域 -->
      <scroll-view scroll-y="true" :style="{height: wh+'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="item2,i2 in cateLevel2" :key="i2">
          <!-- 二级分类标题 -->
          <view class="cate-lv2-title">/{{item2.cat_name}}</view>
          <!-- 二级分类下的三级分类列表 -->
          <view class="cate-lv3-list">
            <!-- 三级分类的item项 -->
            <view class="cate-lv3-item" v-for="item3,i3 in item2.children" :key="i3" @click="gotoGoodsList(item3 )">
                <!-- 三级分类的图片 -->
              <image :src="item3.cat_icon" mode=""></image>
              <!-- 三级分类的文本 -->
              <text>{{item3.cat_name }}</text>
            </view>
          </view>
        </view>     
      </scroll-view> 
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
  
	export default {
	  mixins:[badgeMix],
		data() {
			return {
        //当前设备可用的高度
         wh:0,
         cateList:[],
         active:0,
         //二级分类列表
         cateLevel2:[],
         scrollTop:0
			};
		},
    onLoad(){
      //获取设备信息
     const sysInfo = uni.getSystemInfoSync()
      this.wh = sysInfo.windowHeight -50
      this.getCateList()
    },
    methods:{
      //获取分类列表的数据
    async getCateList(){
       const {data:res} = await uni.$http.get('/api/public/v1/categories')
       if(res.meta.status !==200) return uni.$showMsg()
       this.cateList = res.message
       
       //为二级分类赋值
       this.cateLevel2 = res.message[0].children
      },
      activeChanged(i){
        this.active = i
        //重新为二级分类赋值
        this.cateLevel2=this.cateList[i].children
        
        this.scrollTop = this.scrollTop===0?1:0
      },
       //跳转到商品列表页面
      gotoGoodsList(item){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
        })
      },
      gotoSearch(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
	}
</script>

<style lang="scss">
.scoll-view-container{
  display: flex;
  .left-scroll-view{
      width: 120px;
      .left-scroll-view-item{
        background-color: #F7F7F7;
        line-height: 60px;
        text-align: center;
        font-size: 12px;
        &.active{
            background-color: #FFFFFF;
            position: relative;
            &::before{
              content: ' ';
              display: block;
              width: 3px;
              height: 30px;
              background-color: #C00000;
              position: absolute;
              top: 50%;
              left: 0;
              transform: translateY(-50%);
            }
        }
      }
  }
}
.cate-lv2-title{
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv3-list{
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    width: 33.33%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
    image{
      width: 60px;
      height: 60px;
    }
    text{
      font-size: 12px;
    }
  }
}
</style>
